US6009623A - Razor with in situ sensor - Google Patents

Razor with in situ sensor Download PDF

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Publication number
US6009623A
US6009623A US08/942,527 US94252797A US6009623A US 6009623 A US6009623 A US 6009623A US 94252797 A US94252797 A US 94252797A US 6009623 A US6009623 A US 6009623A
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US
United States
Prior art keywords
razor
situ
feedback signal
handle
blades
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/942,527
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English (en)
Inventor
Glennis J. Orloff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Edgewell Personal Care Brands LLC
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Warner Lambert Co LLC
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Priority to US08/942,527 priority Critical patent/US6009623A/en
Application filed by Warner Lambert Co LLC filed Critical Warner Lambert Co LLC
Assigned to WARNER-LAMBERT COMPANY reassignment WARNER-LAMBERT COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ORLOFF, GLENNIS
Priority to CA002246822A priority patent/CA2246822A1/en
Priority to EP98307575A priority patent/EP0906814B2/en
Priority to DE69801141T priority patent/DE69801141T3/de
Priority to JP26604598A priority patent/JP4446131B2/ja
Priority to AU87025/98A priority patent/AU754519B2/en
Publication of US6009623A publication Critical patent/US6009623A/en
Application granted granted Critical
Assigned to EVEREADY BATTERY COMPANY, INC. reassignment EVEREADY BATTERY COMPANY, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WARNER-LAMBERT COMPANY LLC
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/40—Details or accessories
    • B26B21/4081—Shaving methods; Usage or wear indication; Testing methods
    • B26B21/4087—Usage or wear indication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/40—Details or accessories
    • B26B21/405—Electric features; Charging; Computing devices
    • B26B21/4056—Sensors or controlling means

Definitions

  • This invention relates to the placement of one or more in situ sensors in razor heads, cartridges, or handles to produce a movement or indication to aid in the quality of the shave.
  • Efforts to improve shave quality have been on-going for many years. Much of the effort to improve shave quality has been directed toward making razor cartridges and blades more responsive to the various forces encountered by the razor during shaving. Examples of the results include razor systems having movable components, such as blades, cartridges which flex or bend in response to shaving forces and blades which move inward and outward in response to those forces.
  • One common thread between all previous shaving systems with movable components is that the movements are produced by the function of a mechanical element, such as a spring or pivot. Consequently, one limitation on the function of all of these prior razor systems is that they are only as sensitive as their mechanical elements.
  • a razor system which did not depend upon mechanical elements for sensing the need for movement of the razor components but instead depended upon a more sensitive medium, such as an electronic sensor, to signal that the position of the razor cartridge or the cartridge itself needs changing. Accordingly, it is an objective of the present invention to provide a razor system having electronic sensors which provide a signal which produces movement to adjust the position of the blades or produces an indication to the user that the blades should be repositioned or replaced.
  • the present invention is directed to a wet shave shaving system which contains an in situ sensor within the razor cartridge.
  • the sensor preferably comprises either a piezoelectric or a piezoresistive material which produces an electrical signal or resistance change when it is strained.
  • the signal would be transferred from the cartridge to the razor handle where an electronically-activated actuator would extend or retract as necessary to position the blades to produce a shave with a constant shave force.
  • an electronically-activated element such as an indicator light
  • the signal would provide an indication to the user that the blades are worn and should be replaced.
  • FIG. 1 is a top view of a razor cartridge having an in situ sensor.
  • FIG. 2 is a cut-away view through line 2--2 of the razor cartridge having an in situ sensor.
  • FIG. 3 is a front view of an alternative embodiment of a razor cartridge having an in situ sensor.
  • FIG. 4 is a cut-away view through line 4--4 of the razor cartridge having an in situ sensor.
  • FIG. 5A is a top view of razor handle and a cut-away view of a razor cartridge having an in situ sensor in the handle.
  • FIG. 5B is top view of a razor handle and a cut-away view of a razor cartridge having an actuator adapted to receive signals from an in situ sensor in a razor cartridge.
  • FIG. 6a is a top view of a razor handle and cartridge having an actuator in a retracted position.
  • FIG. 6b is a top view of a razor handle and cartridge having an actuator in an unbiased position.
  • FIG. 6c is a top view of a razor handle and cartridge having an actuator in an extended position.
  • FIG. 7 is a top view of a razor handle and cartridge having an indicator light.
  • FIG. 8 is a top view of a razor handle and a cut-away view of a razor cartridge having a sliding potentiometer.
  • FIG. 9 is a top view of a razor handle and a cut-away view of a razor cartridge having a potentiometer.
  • wet shave razors are defined to be razors which are customarily utilized in conjunction with soap or shaving cream and hot water.
  • the definition of wet shave razors includes both disposable razors, in which the user discards the entire unit after a certain number of uses, and permanent systems, with which the user discards and replaces the razor cartridge after a certain number of uses.
  • the razor head, or cartridge is the portion which surrounds and contains the blade or blades.
  • the combination of the razor head and the handle, either permanent or disposable, is defined as the razor system.
  • the present invention provides for a wet shave razor head having one or more in situ sensors which receive and produce a response to the forces encountered by the razor head during shaving.
  • the sensors are preferably constructed from either a piezoelectric or a piezoresistive material which produce an electrical signal or resistance change when they are strained.
  • a preferred piezoelectric polymer is polyvinylidene fluoride (PVDF) of the type sold by Amp Inc., Valley Forge, Penn. PVDF is especially preferred as a sensor because it is very flexible and provides a good, strong electrical signal.
  • PVDF is commercially available in forms of various thickness which facilitates the processing of the material into a sensor which may be placed in virtually any location in a razor system.
  • piezoelectric polymer sensor is a film which is applied directly to or close to the blades within the razor head.
  • Preferred piezoresistive materials include graphite or pressure sensitive inks placed between mylar or another flexible, non-conductive support, conductive foams and strain gauges consisting of a grid of fine wire or a constantan metal foil grid encapsulated in a thin resin backing. These piezoresistive materials are all capable of producing an electrical signal in response to forces encountered during shaving.
  • the sensor may comprise a potentiometer.
  • the in situ sensor may be placed in any desired location on the razor and FIGS. 1-4 illustrate presently preferred sensor locations.
  • the in situ sensor may be utilized in a razor having one, two, three or any other number of blades.
  • FIGS. 1 and 2 illustrate cartridge 10 having two blades, 11, 12 and, in a preferred embodiment, comfort strip 16.
  • the in situ sensor in the form of a piezoelectric polymer or piezoresistive film 14, 15, is coated on a portion of blades 11, 12 such that the film will be in a position to detect the result of the forces encountered during shaving and to provide an electrical signal based on those forces.
  • Means for transmitting the electrical signal from the in situ sensor to the receptor are also provided within the razor head.
  • such transmitting means comprise a conductive material, such as wire 18, which receives the electrical signal or signals from the sensor or sensors and then transmits the signals through the razor head to one or more receptors, which are preferably located within the razor handle.
  • the in situ sensor is in the form of a solid piece of a piezoelectric or piezoresistive material 23, preferably PVDF or a composite thereof, which is located between the two blades 21, 22.
  • the sensor acts as a spacer to hold the two blades away from each other and at the same time detects the result of forces encountered during shaving.
  • the location of the sensor in this embodiment is particularly useful for detecting forces acting on the razor head 20.
  • the sensor generates an electrical signal from the forces transmitted through transmitting means 24 to one or more receptors which are preferably located within the razor handle.
  • the senor may be positioned within the razor handle. In this embodiment, the sensor would indirectly measure the forces on the blade or blades which are transferred to the handle.
  • a preferred embodiment of this alternative illustrated in FIG. 5A employs a piezoresistive or piezoelectric sensor 51 which is placed in the handle 30.
  • a movable piston 50 is placed in contact with the razor cartridge 52 or blades and translates the forces encountered during shaving to the sensor.
  • FIG. 5B illustrates the razor handle 30 of the present invention.
  • the handle in this case illustrated as a permanent system with a replaceable cartridge, comprises attachment means 32 for the attachment of the razor cartridge, piston 31, conductor 34 and a receptor which is illustrated in FIG. 5B in the form of electric motor 38.
  • conductor 34 is connected to the transmitting means of the razor head to form a circuit and receive the in situ sensor signal through the transmitting means.
  • the transmitting means of the razor head and the conductor may be a single unit.
  • the connection is accomplished by placing connectors on the exposed ends of the transmitting means and the conductor so that they attach to each other upon the placement of a razor head on the handle.
  • the conductor may be constructed from any suitable conductive material, such as copper wire.
  • the first receptor embodiment is an active system in which the receptor is in the form of a simple signal processing circuit which processes the in situ sensor signal and produces a response to move and position the blades.
  • the receptor is a signal processing circuit in conjunction with an actuator which is used to move and position the piston 31.
  • the actuator may be any means for sufficiently moving the piston, as illustrated the actuator is preferably lead screw 36 which is driven by electric motor 38 in series with coupling device 37.
  • the piston 31 or a portion of the piston is threaded and rides along the lead screw as the motor responds to the feedback signal generated by the signal processing circuit in response to the in situ sensor.
  • Conductor 34 transmits the electrical signal from the in situ sensor to the signal processing circuit to complete the electrical circuit. Based on the motor's response to the in situ sensor signal, lead screw 36 rotates and piston 31 correspondingly extends and retracts as necessary to flex the razor head to position the razor head to produce a consistent shave. As illustrated in FIGS. 6a, 6b and 6c, the expansion of the piston 31 will flex the razor head 35 into a convex shape while the retraction of the piston will flex the razor head into a concave shape.
  • the second preferred receptor embodiment is a passive system.
  • one or more sensors, conductors and transmitting means between the razor head and the handle may be as in the previous embodiment.
  • the receptor in handle 40 does not produce motion but instead is a signal processing circuit which activates an indicator, such as light 41.
  • the receptor in the passive system may also activate a light emitting diode (LED) or any other desired indicator.
  • the signal processing circuit receives the electrical signal from the in situ sensors and activates an indicator, such as a light, which provides the user with a visual signal that he or she should take some action.
  • the in situ sensor may be used to differentiate that the user is exerting too much or too little pressure during shaving by generating a comparable electrical signal that would produce a visual indication to the user to change the shaving pressure.
  • the evolution of additional shaving pressure may be used to indicate that either the disposable razor should be discarded or, in a permanent system, that the razor head should be replaced.
  • the voltage may be used to activate a device such as a motor or piezoelectric transducer to produce a motion, such as a vibration, or to activate an electric circuit on a circuit board or solid state chip which produces an audible sound, such as notes of a song and/or a human-like voice.
  • the passive system may be combined with the active system.
  • the receptor may activate an actuator to produce a constant shave pressure while at the same time lighting an indicator to indicate that the blades are worn and need replacing.
  • FIGS. 8 and 9 Further alternative embodiments of an in situ sensor comprising a potentiometer are illustrated in FIGS. 8 and 9.
  • the potentiometer detects changes in the forces applied to the blades upon transfer to the potentiometer shaft. Movement of the potentiometer shaft via a translation, as in a sliding potentiometer, or rotation, as in a potentiometer, results in a change in resistance indicative of the forces applied to the blades. Changes in resistance may be converted into an equivalent voltage change and utilized to activate a device.
  • sliding potentiometer 60 is located in handle 30. Potentiometer shaft 61 of the sliding potentiometer receives forces from the blades through the shaving cartridge 63 via piston 62.
  • the change in resistance resulting from the movement of the potentiometer shaft along the sliding potentiometer may be converted into an equivalent voltage change and utilized to activate an actuator or indicator or some other device which will movably respond or produce a visual indication to the user.
  • a potentiometer 71 is located in handle 30. Forces encountered during shaving are translated from cartridge 74 via piston 73 to lever 72 and then onto potentiometer shaft 71. As with the previous embodiment, the translation of the forces will cause the potentiometer to produce a resistance change which may be converted to an equivalent voltage and utilized to activate an actuator or visual indicator in response to the applied shaving forces.
  • a combination of receptors may be employed such that either multiple active responses are produced, multiple passive responses are produced, or a combination of active and passive responses are produced.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
US08/942,527 1997-10-02 1997-10-02 Razor with in situ sensor Expired - Lifetime US6009623A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US08/942,527 US6009623A (en) 1997-10-02 1997-10-02 Razor with in situ sensor
CA002246822A CA2246822A1 (en) 1997-10-02 1998-09-04 Razor with in situ sensor
EP98307575A EP0906814B2 (en) 1997-10-02 1998-09-17 Razor with in situ sensor
DE69801141T DE69801141T3 (de) 1997-10-02 1998-09-17 Rasierer mit in situ Sensor
JP26604598A JP4446131B2 (ja) 1997-10-02 1998-09-21 カミソリ装置およびカミソリヘッドおよびカミソリハンドル
AU87025/98A AU754519B2 (en) 1997-10-02 1998-09-23 Razor with in situ sensor

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Application Number Priority Date Filing Date Title
US08/942,527 US6009623A (en) 1997-10-02 1997-10-02 Razor with in situ sensor

Publications (1)

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US6009623A true US6009623A (en) 2000-01-04

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US08/942,527 Expired - Lifetime US6009623A (en) 1997-10-02 1997-10-02 Razor with in situ sensor

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US (1) US6009623A (ja)
EP (1) EP0906814B2 (ja)
JP (1) JP4446131B2 (ja)
AU (1) AU754519B2 (ja)
CA (1) CA2246822A1 (ja)
DE (1) DE69801141T3 (ja)

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US20070050982A1 (en) * 2005-09-06 2007-03-08 The Gillette Company, A Delaware Corporation Powered wet-shaving razor
US20070089297A1 (en) * 2003-12-10 2007-04-26 Koninklijke Philips Electronics N.V. Shaving head with skin stretching member
US20080168657A1 (en) * 2007-01-12 2008-07-17 Cinzia Simonis Cloke Razor cartridge measurement apparatus
US20080189953A1 (en) * 2007-02-14 2008-08-14 The Gillette Company Safety razor
CN100436087C (zh) * 2003-02-19 2008-11-26 吉列公司 手持用具
US20090053325A1 (en) * 2005-11-28 2009-02-26 Taiko Pharmaceutical Co., Ltd. Method of Controlling Floating Virus Infection
US20090071010A1 (en) * 2007-09-17 2009-03-19 Robert Anthony Hart Cartridge Life Indicator
US20090071008A1 (en) * 2007-09-17 2009-03-19 Robert Anthony Hart Cartridge Detachment Sensor
US20090119923A1 (en) * 2007-09-17 2009-05-14 Robert Anthony Hart Sensor For A Razor
US20090126196A1 (en) * 1999-09-27 2009-05-21 Bernard Gilder Safety razors
US8065802B2 (en) 2006-07-14 2011-11-29 The Gillette Company Shaving razor
US20110314677A1 (en) * 2009-02-13 2011-12-29 Eveready Battery Company Inc. Body care device
US20120167392A1 (en) * 2010-12-30 2012-07-05 Stmicroelectronics Pte. Ltd. Razor with chemical and biological sensor
US8495903B1 (en) * 2011-09-07 2013-07-30 The Boeing Company Calibration system for a deburring tool
CN103889667A (zh) * 2012-08-29 2014-06-25 任向荣 剃须刀寿命检测装置、检测方法及其剃须刀
US20140182138A1 (en) * 2012-12-31 2014-07-03 Matthew W. Krenik Hair cutting device for automated hair cutting system
US20160107323A1 (en) * 2013-05-30 2016-04-21 Koninklijke Philips N.V. Device and system for treatinghair and/or skin
US20160167241A1 (en) * 2014-12-10 2016-06-16 Haggai Goldfarb Intelligent shaving system having sensors
US20160236360A1 (en) * 2013-11-05 2016-08-18 Koninklijke Philips N.V. A personal care device
CN107073727A (zh) * 2014-09-26 2017-08-18 皇家飞利浦有限公司 用于皮肤毛发的剃刮设备
US20180056535A1 (en) * 2016-08-31 2018-03-01 Michael Matthews Smart clipper
US20180126571A1 (en) * 2016-10-07 2018-05-10 Leigh M. Rothschild Oral care and grooming device
CN109788989A (zh) * 2016-10-14 2019-05-21 皇家飞利浦有限公司 毛发切削设备和操作毛发切削设备的方法
US11192269B2 (en) * 2017-06-29 2021-12-07 Bic Violex S.A. System and method for electrically sensing shaving razor blade wear
US11224984B2 (en) 2018-07-31 2022-01-18 Bic Violex S.A. Adjustable shaver cartridges and methods thereof
US11504866B2 (en) * 2017-06-29 2022-11-22 BIC Violex Single Member S.A. Shaver and methods for detecting shaving characteristics
US11883968B2 (en) 2016-10-14 2024-01-30 Koninklijke Philips N.V. Cutting length adjustment mechanism, adjustment drive and hair cutting appliance

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US6460251B1 (en) 1998-03-25 2002-10-08 Pfizer Inc. Razor system with worn blade indicator
GB2398533B (en) * 2003-02-19 2005-11-16 Gillette Co Safety razors
GB2398534B (en) * 2003-02-19 2005-11-16 Gillette Co Safety razors
US20080196251A1 (en) * 2007-02-15 2008-08-21 The Gillette Company Support structure for a flexible razor blade assembly
DE202013003009U1 (de) 2013-04-01 2013-06-26 Axel R. Hidde Mechanischer Komfort-Rasierer
RU2684005C2 (ru) 2014-10-07 2019-04-03 Конинклейке Филипс Н.В. Электрическое устройство для выполнения операции срезания волос, присутствующих на участке кожи

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Cited By (59)

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US20090126196A1 (en) * 1999-09-27 2009-05-21 Bernard Gilder Safety razors
US8117753B2 (en) 1999-09-27 2012-02-21 The Gillette Company Safety razors
US6972199B2 (en) 2000-07-25 2005-12-06 Verimetra, Inc. Method of making a cutting instrument having integrated sensors
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JPH11156069A (ja) 1999-06-15
DE69801141T3 (de) 2007-11-22
AU754519B2 (en) 2002-11-21
EP0906814B1 (en) 2001-07-18
EP0906814A1 (en) 1999-04-07
DE69801141T2 (de) 2002-03-21
JP4446131B2 (ja) 2010-04-07
DE69801141D1 (de) 2001-08-23
AU8702598A (en) 1999-04-22
CA2246822A1 (en) 1999-04-02
EP0906814B2 (en) 2007-06-27

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